Optical Glue Dispensing Feedback for Real-Time Volume Control

The patent implements a closed-loop feedback system where an optical measuring unit captures images of the dispensed glue, the calculating unit determines the actual glue amount from these images, and the glue dispensing control unit adjusts subsequent dispensing based on this feedback. This resolves the contradiction by enabling real-time measurement and adjustment, transforming open-loop dispensing into closed-loop controlled dispensing.

The patent replaces traditional mechanical or program-based positioning methods with an optical measurement system. Instead of relying solely on pre-programmed coordinates and mechanical dispensing control, the system uses optical imaging and image processing to measure actual glue placement and amount, substituting mechanical control with optical detection and computational adjustment.

The optical measuring unit serves multiple functions: it captures images of the dispensed glue for measurement, provides feedback information for control adjustment, and can potentially monitor multiple dispensing points. The calculating unit both measures actual glue amount and generates adjustment signals. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing system complexity while achieving high precision.

The patent introduces an optical field as an intermediary between the glue dispensing process and the measurement system. Instead of direct mechanical contact or complex sensor arrays, the optical measuring unit uses light to non-invasively measure glue placement and amount. This intermediary approach simplifies the interaction between the dispensing system and measurement system, reducing overall complexity while maintaining high precision.

The patent performs preliminary measurement and adjustment within the same processing cycle. The optical measuring unit measures the glue dispensed on the current substrate, and the control unit adjusts dispensing parameters for the next substrate before processing continues. This preliminary action ensures quality is maintained proactively rather than reactively, preventing defects before they propagate through the production line.

The patent maintains continuous processing speed while adding measurement and adjustment functions. The optical measurement occurs during or immediately after dispensing without stopping the production line, and the adjustment is calculated and applied to the next dispensing action seamlessly. This continuity ensures that the useful action of bonding production continues uninterrupted while quality control is integrated into the flow.